OK, this is supposed to be a technical web site. It’s about time I posted something technical! Actually, this is just a link to a white paper I posted in the Digital Designs section.
A microprocessor-based design needed to create a circular motion by using the cosine and sine functions to drive X and Y positioners. The exact equations for these functions are infinitely long polynomials, so approximations are needed. We studied three possibilities, each with different tradeoffs between accuracy and speed.
If you ever need to compute sine and cosine, here’s the link: White Paper: Simple Sine Approximations.